Changed defaults for CC_R and LD_R
Changed defaults for CC_R and LD_R

- If CC_R and LD_R aren't given for linux builds, set them equal to
  CC and LD.  No need for them to be different
- If they aren't given for AIX, logic left the same as a best guess

mklight/eCMD,open-power/eCMD,mklight/eCMD,open-power/eCMD,open-power/eCMD,mklight/eCMD,open-power/eCMD,mklight/eCMD,mklight/eCMD,open-power/eCMD